Pi Motorsport Journal
Exhaust knowledge, without the guesswork.
Practical guidance on custom fabrication, sound, repairs and planning the right exhaust work for your car.
More from the workshop
New guidance added regularlyExhaust Guides
4 November 2026
Silencer Placement Explained: Controlling Volume, Tone and Drone
Why silencer size and position must be planned together, and how front, centre and rear placement influence sound, clearance and cabin comfort.
Exhaust Guides
31 October 2026
How Exhaust Valve Placement Changes Sound and Cabin Comfort
Why a valve near the front, middle or rear of an exhaust changes which components are bypassed, the sound difference, heat exposure and cabin experience.
Exhaust Guides
28 October 2026
Can a Valved Exhaust Be Added to an Existing System?
When an exhaust-valve retrofit is feasible, what must be inspected and why valve size, placement, control and the quieter route need planning together.
Exhaust Guides
24 October 2026
Custom Exhausts for Weekend and Track Cars: Building Around the Car's Real Use
Plan a performance exhaust around actual road and circuit use, including heat, noise limits, packaging, service access and the journey home.
Exhaust Guides
21 October 2026
Custom Exhausts for Daily Drivers: Better Sound Without Ruining the Commute
How to specify a daily-driver exhaust around cold starts, traffic, motorway drone, passengers and long-term comfort while still adding character.
Workshop Advice
17 October 2026
What Makes a Premium Custom Exhaust Different From a Cheap Modification?
Compare assessment, material, fit-up, sound control, welding and aftercare so a custom exhaust quotation can be judged on value rather than appearance alone.
Exhaust Guides
14 October 2026
Why Exhaust Pipe Diameter Matters - and Why Bigger Is Not Always Better
How engine output, gas speed, layout, noise and future plans influence exhaust pipe sizing, and why the largest tube is rarely a complete specification.
Exhaust Guides
10 October 2026
TIG Welding and Back Purging: Why They Matter in Exhaust Fabrication
What TIG welding and back purging contribute to stainless exhaust joints, where workmanship matters and what owners can reasonably inspect.
Workshop Advice
7 October 2026
What Happens During a Pi Motorsport Exhaust Assessment?
A step-by-step explanation of the vehicle, sound, condition and fabrication checks used to turn an exhaust enquiry into a workable specification.
Workshop Advice
3 October 2026
How Much Does a Custom Exhaust Cost? The Factors Behind a Proper Quote
Understand what changes a custom exhaust quotation and how to compare fabrication scope, materials, sound control and finish fairly.
Workshop Advice
30 September 2026
Can an Existing Exhaust Be Modified Instead of Fully Replaced?
When a sound, fitment or repair goal may be achieved by modifying one exhaust section, and when full replacement is the better value.
Exhaust Guides
26 September 2026
Choosing Exhaust Tips: Shape, Size, Finish and Position
A detailed guide to choosing exhaust tips that suit the bumper, system and maintenance expectations, not just the catalogue photograph.
Exhaust Guides
23 September 2026
Single-Exit vs Twin-Exit Exhausts: Sound, Style and Packaging
Compare single- and twin-exit custom exhaust layouts without confusing visible tailpipes with the system's true flow or sound design.
Workshop Advice
19 September 2026
Blowing Exhaust Symptoms: Leaks, Failed Joints and Damaged Flexi Pipes
Recognise the sounds, smells and staining associated with exhaust leaks and understand when a joint, flexi or fabricated section may need repair.
Workshop Advice
16 September 2026
What Causes an Exhaust Rattle at Idle or Over Bumps?
How to separate exhaust rattles from knocks, buzzes and internal failures, plus what a proper workshop inspection should cover.
Exhaust Guides
12 September 2026
What Causes Exhaust Drone and How Can It Be Reduced?
Why some exhausts create a tiring cabin hum at steady speed and the assessment-led ways a fabricator can reduce it.
Workshop Advice
9 September 2026
Edinburgh to Birmingham for a Bespoke Exhaust: Appointment and Travel Guide
What Edinburgh drivers should organise before a bespoke exhaust appointment in Birmingham and how to make collection and aftercare straightforward.
Workshop Advice
5 September 2026
Scotland to Birmingham for Custom Exhaust Fabrication: Plan the Trip
A practical framework for Scottish customers considering specialist exhaust fabrication in Birmingham, including remote preparation and return travel.
Workshop Advice
2 September 2026
Newcastle to Birmingham for Custom Exhaust Work: A Planning Guide
How Newcastle owners can prepare for a Birmingham custom-exhaust appointment, from the first specification call to travel and collection.
Workshop Advice
29 August 2026
Liverpool to Birmingham for Bespoke Exhaust Work: A Planning Guide
A step-by-step guide for Liverpool owners arranging repair, fabrication or a complete custom exhaust appointment in Birmingham.
Workshop Advice
26 August 2026
Manchester to Birmingham for a Custom Exhaust: Planning Your Visit
How Manchester owners can prepare a remote brief, choose the right appointment and manage a specialist fabrication visit.
Workshop Advice
22 August 2026
How to Describe the Exhaust Sound You Actually Want
A practical vocabulary and listening checklist for turning vague sound references into a usable custom-exhaust brief.
Exhaust Guides
19 August 2026
Stainless Steel Exhausts: Grades, Durability and What Quality Looks Like
A buyer's guide to stainless exhaust material, wall thickness, welding, supports, finish and the details that influence service life.
Exhaust Guides
15 August 2026
What Does a High-Flow Silencer Do to Exhaust Sound and Comfort?
How silencer size, internal design and placement can control volume and drone without treating sound and flow as opposites.
Exhaust Guides
12 August 2026
Custom Exhaust Manifolds Explained: Design, Fitment and Fabrication
How runner layout, collectors, flanges, heat, access and the rest of the exhaust shape a custom manifold project.
Exhaust Guides
8 August 2026
Back-Box Delete or Custom Rear Section: Which Is the Better Option?
A practical comparison of straight-pipe back-box deletes and designed rear sections for sound, fitment, appearance and daily use.
Exhaust Guides
5 August 2026
Resonator Delete Guide: Sound, Drone and Daily Driving
What a resonator delete can change, why results differ between cars and how to judge whether the trade-off suits a daily driver.
Workshop Advice
1 August 2026
Seven Signs Your Exhaust Needs Professional Repair
Seven symptoms that justify an exhaust inspection, what they may indicate and when the car should not be driven until it is checked.
Exhaust Guides
29 July 2026
Cat-Back vs Turbo-Back Exhaust: Which System Suits Your Build?
A clear comparison of cat-back and turbo-back exhaust systems, including scope, sound, fitment and the questions to answer before choosing.
Exhaust Guides
25 July 2026
Custom Exhausts for London Cars: Sound, Refinement and Motorway Comfort
How to specify a custom exhaust that remains usable in London traffic and comfortable on longer motorway journeys.
Workshop Advice
22 July 2026
Planning a Bournemouth-to-Birmingham Bespoke Exhaust Visit
How Bournemouth performance-car owners can prepare for a focused exhaust assessment and fabrication appointment in Birmingham.
Workshop Advice
18 July 2026
Southampton to Birmingham for a Classic-Car Exhaust: Plan the Job
A practical checklist for Southampton classic-car owners considering specialist exhaust fabrication in Birmingham.
Exhaust Guides
15 July 2026
Classic-Car Exhaust Fabrication: Preserving Character and Fit
How bespoke fabrication can solve obsolete parts, poor fit and unwanted noise while respecting the character of a classic car.
Exhaust Guides
11 July 2026
Is a Valved Exhaust System Right for Your Car?
How valved exhausts work, what they can change and the questions to answer before adding one to a road car.
Exhaust Guides
8 July 2026
Custom Cat-Back Exhaust Systems: A Complete Buyer's Guide
A practical guide to sound, materials, pipework, silencers and the details worth agreeing before a custom cat-back is fabricated.
Workshop Advice
4 July 2026
Exhaust Repair or Replacement? How a Specialist Makes the Right Call
Leaks, rattles and damaged sections do not always mean a complete new exhaust. Here is what a useful workshop assessment should establish.
Workshop Advice
1 July 2026
Custom Exhaust Fabrication Birmingham: Your First Assessment
What Pi Motorsport checks, what to bring and how a clear brief turns an exhaust idea into a practical fabrication plan.